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H.L. Dunegan, May, 1996
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PREDICTION OF EARTHQUAKES Prepared for presentation at 6th Conference on AE/MS Activity in Geologic Structures and Materials Pennsylvania State University June 11-13, 1996. PREDICTION OF EARTHQUAKES WITH AE/MS? WHY NOT H.L. Dunegan May, 1996 INTRODUCTION Earthquakes account for more loss of life and...site exerpt
Waves This page uses frames, but your browser doesn't support them or frames are disabled in browser properties. You should use Microsoft Internet Explorer v.4 6, Netscape Navigator v.4 6 or any other browser which supports frames. HOME WAVES MECHANICS OPTICS...Solutions using computer modelling Modal Analysis and fatigue analysis to determine the vibration modes and impact on a building, equipment or mechancial component when exposed to a vibration source.
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Modal Analysis and Fatigue Analysis Any physical system can vibrate. The frequencies at which vibration naturally occurs, and the modal shapes which the vibrating system assumes are properties of the system, and can be determined analytically using Modal Analysis. Analysis of vibration modes is a...Violinmaker and aoustic researcher D.Ennemoser's C37-theory of natural sound, including applications on violins and loudpeakers.
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C37 Acoustics Dieter Ennemoser, Violin Maker and Acoustic Researcher Hier werden die akustischen und technischen Zusammenhänge des menschlichen Musik- und Hörempfindens erläutert und die sensationellen Möglichkeiten, die sich der Musikwelt aufgrund dieser Erkenntnisse bieten, aufgezeigt. Es sei dieses Forum die Basis, das Wissen, welches rund um dieses Thema entsteht,...Stetson University
http://www.stetson.edu/departmen...s/physics/vholography/theory.htm
NASA's aeronautics research will reduce noise to make helicopters and tiltrotors more acceptable to the public. The objective of IRAP is to acquire rotorcraft noise data in flight for comparison to wind tunnel data.
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IRAP Introduction The type of noise of concern is blade-vortex-interaction or BVI, noise. Microphones on the wing tips and tail fin of the quiet NASA YO-3A Acoustics Research Aircraft measure BVI noise while the YO-3A descends in close formation with the helicopter...wave creation, propagation, reception and understanding are at the core of our business. Sound at frequencies below that which can be heard to light at frequencies above that which can be seen barely begin to span the range of experience and understanding that unify our four technology areas.
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Scientific Applications Research Associates (SARA) Inc. Questions or comments about this page may be directed to webmaster@sara.com Scientific Applications Research Associates SARA) Inc. SARA performs cutting-edge, multi-disciplinary technology development in areas with high potential both in scientific achievement and market impact and transforms the developed technologies...Dr. Gavreau and his staff made a observation which, not only interrupted their work, but became their major research theme. They periodically experienced a disconcerting nausea which flooded the research facility. Low frequency sound (7 Hz) could resonate and cause nausea.
Http://www.borderlands.com/archives/arch/gavreaus.htm
Physical Review (1998)
http://focus.aps.org/v1/st20.html
Weird Project: acoustic - (c)1997 William Beaty
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Weird Project: acoustic frequency hole The device below is a good sound absorber. It probably absorbs certain frequencies much better than others. At first glance you'd think this would be boring. However, the psychological effects are VERY INTERESTING. When you hold the thing up near...Institute for Research in Construction
http://www.nrc.ca/irc/leak/leakdetect.html#PHOTOS
Discussions of loudspeaker plans and designs. Sealed, isobaric, ported, mtm, speaker, esotar, tweeter, woofer, midrange, speaker building
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PureSpeakers Click here to view some new pictures Click here for some simple calculations Sorry, your browser doesn't support Java(tm Welcome to PureSpeakers.com; This page last modified 09/23/01 Loudspeakers that are designed with pure sound reproduction in mind. Introduction PureSpeakers is...contains quite a bit of information on acoustics.
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Table of Contents for Art Ludwig's sound page What makes a sound system good or bad) Sound Demo .wav Files (HRTFs, room simulations, distortion,etc Room Acoustics (room modes, speaker placement, etc My Music Room (Photo; soundproofing, wall treatment) Design of the Sound System (Crossovers, enclosures, etc. Construction of...from Brüel and Kjær
http://www.bksv.com/bksv/?MIval=bk_view_SHTML&ID=1497
Bill & Mary Buchen
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Sonic Architecture Sonic Architecture...